MPAMVPMV_EL2 MPAM Virtual Partition Mapping Valid Register when (FEAT_MPAMv0p1 is implemented or FEAT_MPAMv1p0 is implemented) and MPAMIDR_EL1.HAS_HCR == '1' Valid bits for virtual PARTID mapping entries. Each bit m corresponds to virtual PARTID mapping entry m in the MPAMVPM<n>_EL2 registers where n = m >> 2. MPAM This register has no effect if EL2 is not enabled in the current Security state. MPAMVPMV_EL2 is a 64-bit register. 63 32 63:32 Reserved, RES0. VPM_V<m> 31 0 31:0 Contains valid bit for virtual PARTID mapping entry corresponding to virtual PARTID<m>. 31 0 AU When m >= (UInt(MPAMIDR_EL1.VPMR_MAX) + 1) * 4 RES0 MRS <Xt>, MPAMVPMV_EL2 if !((IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAMIDR_EL1().HAS_HCR == '1') then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if EffectiveHCR_EL2_NVx() IN {'1x1'} then X{64}(t) = NVMem(0x938); elsif EffectiveHCR_EL2_NVx() IN {'xx1'} then if HaveEL(EL3) && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else AArch64_SystemAccessTrap(EL2, 0x18); end; else Undefined(); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then Undefined(); elsif HaveEL(EL3) && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else X{64}(t) = MPAMVPMV_EL2(); end; elsif PSTATE.EL == EL3 then X{64}(t) = MPAMVPMV_EL2(); end; MSR MPAMVPMV_EL2, <Xt> if !((IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAMIDR_EL1().HAS_HCR == '1') then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if EffectiveHCR_EL2_NVx() IN {'1x1'} then NVMem(0x938) = X{64}(t); elsif EffectiveHCR_EL2_NVx() IN {'xx1'} then if HaveEL(EL3) && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else AArch64_SystemAccessTrap(EL2, 0x18); end; else Undefined(); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then Undefined(); elsif HaveEL(EL3) && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else MPAMVPMV_EL2() = X{64}(t); end; elsif PSTATE.EL == EL3 then MPAMVPMV_EL2() = X{64}(t); end; 2026-03-26 20:27:25 2026-03_rel